Make the subtopics method

[KarishmaVanwari]

No description provided.

[jywarren]

(Jeff editing here, adding the discussion we had before:)

Just commenting here with notes from our call before, suggested pseudocode for making remote calls to open sub-topics:

Tag…..each do |subtopic|

    <script>
      $(‘#expand-btn-<%= index %>’).click(function(e) {
        $.ajax(‘/tags/subtopics?subtopic=<%= subtopic %>’).done(function(response) {
            $(‘#contents-UNIQ’).append(response.responseText);
        });
      });
    </script>

end

Controller:

def subtopics
  Tag.find…… params[:subtopic]
  render “tags/subtopic”, layout: false
end

Originally posted by @jywarren in #11332 (comment)

Let's open a new issue for setting this up within the code you created at #11229 !